How to determine when a platform event is completed within an aura component

lightning-aura-componentsplatform-event

I have an aura component that generates new record. The helper calls the Apex controller and the records are generated but they are done via a platform event. How can I determine when the platform event is completed. I want to get the ids of the new records.

helper

var action = component.get("c.submitRecord");   


getJobid: function(component, event, helper, tempId){
         is job created??????
}

Controller

 @AuraEnabled
    public static String (sObject order, sObject job)
    {

        order__c orders= (orders__c) order;
        job__c jobs = (job__c) job;

        insert orders;

        jobs.order__c = orders.Id; //original code before platform event but received error
        insert jobs;    //original code before platform event but received error
  
      
      Publish_Job__e createJob = new Publish_Job__e();
      createJob.job_JSON__c = jobJSON;
      createJob.job_title__c = 'Title';
      Eventbus.publish(createJob);

Best Answer

Assuming that the arrangement you have is necessary, I'd use the lightning:empApi library to subscribe to a second Platform Event that could be fired off by the Platform Event trigger to get the data from the child object once it's done.

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[SalesForce] save two records in two objects with a single save button with lightning components

Here are my recommendation:

QuestionLi Attribute is defined as simple object but when it's passed to server, you are assuming it's list of object. Update this attribute as List of object.
As a best practice, your apex method should return some value to identify, possibly String. Keep your DML in try catch block and return exception if any occurs so that you can debug properly.

public static String saveQuestions (....){
```
   try{

      insert ...

      return 'SUCCESS';

   catch(Excpetion e){ return e.getMessage();}
}
```

[SalesForce] Platform Events process old data

Sometimes I have witnessed platform events being fired and their trigger is run even before the original transaction who fired the event hasn't committed data back to the database.

For an insert, if you can't find that record in the database, you can throw RetryableException. That trigger will run automatically after some time.

throw new EventBus.RetryableException(
                     'Record yet to be committed back to the database');

For an Update: You can pass LastmodifiedDate as a field on platform event, when you query that record if lastModifiedDate is lower than what present in your platform event's field retry it again. This will make sure that trigger doesn't run on old data.

SRC: https://developer.salesforce.com/docs/atlas.en-us.platform_events.meta/platform_events/platform_events_subscribe_apex_refire.htm

EDIT: I raised this on Platform Events Chatter group and got response as its the desired behavior, and they have included this as in consideration. The consideration says to use future/queuable or scheduler to publish platform event which for me defeats the purpose.

https://developer.salesforce.com/docs/atlas.en-us.platform_events.meta/platform_events/platform_events_considerations_decoupled_processes.htm

Best Answer

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[SalesForce] save two records in two objects with a single save button with lightning components

[SalesForce] Platform Events process old data

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